Your laptop mouse or touchpad has failed, you find Mouse Keys, you switch it on - and nothing moves. The reason is simple and rarely stated clearly. Mouse Keys reads the numeric keypad, and many laptops do not have one.
This page exists to save you an hour of pressing the number row and wondering. The number row above the letters never drives Mouse Keys, on any laptop, ever. What might save you is the hidden numpad many laptops carry inside the letter keys, switched on with the Fn key. What definitely saves you is a short list of honest fallbacks - a touchpad if only the mouse died, any borrowed USB or wireless mouse, a cheap USB numpad that gives Mouse Keys its real keys back, and full keyboard navigation that needs no pointer at all. There is also one route that sounds clever and mostly disappoints, the On Screen Keyboard, covered honestly below so you know its limits before an emergency forces you to learn them. Work through the checks in order - the first one takes thirty seconds and fixes a surprising number of laptops.
Check your keyboard carefully - many mid size laptops hide the numpad inside the letter keys in a second colour
Many laptops print small numbers on the letter keys - usually around U I O and J K L - in a different colour.
Honest warning - while the overlay is active those letters type numbers, not letters. Turn the overlay off again before typing passwords or documents, or you will produce very confusing text.
On an overlay laptop, the Num Lock setting inside Mouse Keys decides whether anything responds.
Two switches controlling the same pad is exactly why laptop Mouse Keys feels haunted. Change one thing at a time and test after each change, and the pattern reveals itself quickly.
Windows has an On Screen Keyboard with a numpad option, and it is fair to know what it can and cannot do.
Here is the honesty. Clicking those on screen numpad keys needs a working pointer - which is the very thing you lost. If your touchpad still works, the on screen pad can drive Mouse Keys as a curiosity, but your touchpad is already the better tool. If nothing points at all, this route is a circle. Skip it and use the fallbacks below instead.
When there is no numpad, these are the routes that actually get work done.
For pure rescue work - saving files, sending one mail, shutting down cleanly - keyboard navigation alone is often faster than fighting for a pointer.
The best time to solve the laptop numpad question is today, while everything works.
That two minute check converts a future dead touchpad from a crisis into a minor annoyance - which is the entire point of knowing this feature exists.
See Mouse Keys switched on and used live in the full video - the fastest way to learn the key positions by watching them pressed in order.
Watch Full VideoBecause Mouse Keys only listens to the numeric keypad, and the number row above the letters is a different set of keys. Some laptops hide a numpad inside the letter keys behind Fn and Num Lock - check for small printed digits on keys like U, I, O and J, K, L. If there is no overlay, the number row will never work for this.
Only if you already have a working pointer such as a touchpad to click its keys, in which case the touchpad itself is the simpler tool. Without any pointer you cannot click the on screen numpad, so it cannot rescue you. A spare mouse or a USB numpad is the honest fix for a laptop with no numpad.
A basic USB numpad or a basic wired mouse - both are inexpensive and need no setup on Windows. A wired mouse is the more universal rescue. A USB numpad has the bonus of making Mouse Keys itself fully usable, and it is small enough to live permanently in a laptop bag.